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Development of Statistical Plasticity for Reconstruction of Macroscopic Material Properties Induced by Microscopic Fluctuations

Research Project

Project/Area Number 21K03745
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 18010:Mechanics of materials and materials-related
Research InstitutionTohoku University

Principal Investigator

Aoyagi Yoshiteru  東北大学, 工学研究科, 准教授 (70433737)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsゆらぎ / 結晶塑性論 / 統計処理 / 機械学習 / 力学異方性 / 微視的材料組織 / 転位密度 / 結晶方位 / 多結晶材料 / 力学特性 / 結晶組織 / ナノインデンテーション / 圧延材料 / 強圧延材料 / 材料特性予測 / 微視的ゆらぎ / 極値統計解析 / 統計塑性学 / 材料特性
Outline of Research at the Start

本研究では,材料内部に存在する「ゆらぎ」に注目し,材料の微視的構造に基づく真の構造解析システムの創成を目指す.材料の微視的構造に注目すると,完全に同じ構造を有する領域は一部として見られず,構造の差に起因して材料は異なる挙動を示す.すなわち,ごく一部の微視的構造に注目しても材料全体としての力学挙動を再現することは不可能である.本研究ではこの様な構造の差を「ゆらぎ」とし,統計学分野における極値分布理論を用いて不均質材料の変形挙動を高精度に再現するCAE システムを確立する.

Outline of Final Research Achievements

This study proposed a quantitative method to evaluate the crystal orientation to control the “fluctuation” in crystal orientation that causes mechanical anisotropy. The presented method could reproduce the mechanical anisotropy that could not be expressed only by the crystal orientation by giving an appropriate initial dislocation density for each slip system. Furthermore, in this study, machine learning considering “fluctuation” was performed using stress-strain curves and load-displacement curves for 30 different materials as input and output data, and unknown stress-strain curves were predicted from the load-displacement curves. The macroscopic mechanical properties of polycrystalline metals with fluctuating microscopic mechanical properties were successfully predicted.

Academic Significance and Societal Importance of the Research Achievements

局所的に材料を見てしまうと材料の持っている巨視的な性質を見誤る可能性がある.本研究では,材料内に存在する「ゆらぎ」を適切に処理することによって,局所的な微視的材料組織から巨視的な力学特性を予測することに成功した.このような研究は,材料開発において多大なコストがかかる試作や力学特性測定の回数を激減させることができる.本研究成果によって従来の特性を凌駕した新たな材料組織を予測することが数値解析的に可能となるため,材料開発のブレークスルーとなりえる.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (36 results)

All 2024 2023 2022 2021 Other

All Journal Article (4 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (30 results) (of which Int'l Joint Research: 12 results,  Invited: 6 results) Remarks (2 results)

  • [Journal Article] Crystalline Plasticity Simulation Reproducing Mechanical Anisotropy Caused by Rolling-induced Microstructures2023

    • Author(s)
      青柳 吉輝, 柳沼 雄介
    • Journal Title

      Journal of the Society of Materials Science, Japan

      Volume: 72 Issue: 11 Pages: 774-781

    • DOI

      10.2472/jsms.72.774

    • ISSN
      0514-5163, 1880-7488
    • Year and Date
      2023-11-15
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Macroscopic Yielding Behavior of Ultrafine-grained Aluminum by Crystal Plasticity Simulation2023

    • Author(s)
      青柳吉輝
    • Journal Title

      PLASTOS

      Volume: 6 Issue: 61 Pages: 38-42

    • DOI

      10.32277/plastos.6.61_38

    • ISSN
      2433-8826
    • Related Report
      2022 Research-status Report
  • [Journal Article] Age-hardening mechanisms of heterogeneous-nanostructured SUS316LN stainless steel fabricated by heavy cold rolling2022

    • Author(s)
      Miura Hiromi、Watanabe Chihiro、Aoyagi Yoshiteru、Oba Yojiro、Kobayashi Masakazu、Yoshinaga Naoki
    • Journal Title

      Materials Science and Engineering: A

      Volume: 833 Pages: 142531-142531

    • DOI

      10.1016/j.msea.2021.142531

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effects of strain rate on mechanical properties of heterogeneous nano-structured SUS316LN stainless steel: Revealed by in-situ X-Ray diffraction at synchrotron radiation facility2021

    • Author(s)
      Jiang Hua、Watanabe Chihiro、Miyajima Yoji、Koga Norimitsu、Aoyagi Yoshiteru、Kobayashi Masakazu、Miura Hiromi
    • Journal Title

      Materials Science and Engineering: A

      Volume: 815 Pages: 141251-141251

    • DOI

      10.1016/j.msea.2021.141251

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] Multiscale modeling of nonlinear viscoelasticity-viscoplasticity of amorphous polymers under various loading conditions2024

    • Author(s)
      Yoshiteru Aoyagi
    • Organizer
      International Symposium on Plasticity, Damage, and Fracture 2024
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Crystal Plasticity FE Simulation Reproducing Mechanical Anisotropy Based on Microstructure of Rolled Metals2023

    • Author(s)
      Yoshiteru Aoyagi
    • Organizer
      International Conference on Processing & Manufacturing of Advanced Materials
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Microstructure and strengthening mechanisms of heterogeneous-nanostructured 316LN stainless steel prepared by heavy cold rolling2023

    • Author(s)
      Hiromi Miura, Yojiro Oba, Yoshiteru Aoyagi, Masakazu Kobayashi, Chihiro Watanabe
    • Organizer
      International Conference on Processing & Manufacturing of Advanced Materials
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Crystal Plasticity Simulation Considering Microstructures of Metals on Mechanical Anisotropy Induced by Rolling2023

    • Author(s)
      Nom Gerel-Erdene, Yoshiteru Aoyagi
    • Organizer
      The 11th Pacific Rim International Conference on Advances Materials and Processing
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Modeling of Crystal Plasticity Predicting Microstructural Changes Caused by Twinning-Induced Plasticity2023

    • Author(s)
      Haruki Ohashi, Yoshiteru Aoyagi
    • Organizer
      The 11th Pacific Rim International Conference on Advanced Materials and Processing
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Prediction of Macroscopic Mechanical Properties of Heterogeneous Structured Metals Based on Neural Network2023

    • Author(s)
      Masaki Nishimura, Yoshiteru Aoyagi
    • Organizer
      The 11th Pacific Rim International Conference on Advanced Materials and Processing
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 圧延加工に起因する結晶方位配向および転位組織を考慮した結晶塑性シミュレーション2023

    • Author(s)
      大橋春希, 柳沼雄介, 青柳吉輝
    • Organizer
      日本材料学会第72期学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 双晶変形における格子変形および双晶境界の影響を考慮した結晶塑性シミュレーション2023

    • Author(s)
      大橋春希, 青柳吉輝
    • Organizer
      第9回材料WEEK 材料シンポジウム ワークショップ
    • Related Report
      2023 Annual Research Report
  • [Presentation] ヘテロナノ組織を有したSUS316LNステンレス鋼の粒界偏析に関する結晶塑性解析2023

    • Author(s)
      林剣心, 渡辺千尋, 三浦博己, 青柳吉輝
    • Organizer
      第9回材料WEEK 材料シンポジウム ワークショップ
    • Related Report
      2023 Annual Research Report
  • [Presentation] Microstructure and mechanical properties of heterogeneous-nanostructured austenitic stainless steel fabricated by heavy cold rolling2023

    • Author(s)
      Hiromi Miura, Chihiro Watanabe, Yoshiteru Aoyagi, Yojiro Oba, Masakazu Kobayashi
    • Organizer
      International Symposium on Plasticity, Damage, and Fracture 2023
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Crystal plasticity modeling on martensitic transformation induced plasticity based on lattice deformation2023

    • Author(s)
      Yoshiteru Aoyagi
    • Organizer
      International Symposium on Plasticity, Damage, and Fracture 2023
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 双晶変形に起因する不均一変形の緩和を考慮した結晶塑性モデリング2023

    • Author(s)
      大橋春希, 青柳吉輝
    • Organizer
      日本機械学会東北支部第58期総会・講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Investigation of Effect of Microstructure on Mechanical Properties of Poly (L-lactic acid) by Molecular Dynamics Simulation2023

    • Author(s)
      呉高天, 青柳吉輝
    • Organizer
      日本機械学会東北支部第58期総会・講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Reproduction Method of Mechanical Anisotropy Induced by Cold Rolling in Crystal Plasticity FE Simulation2022

    • Author(s)
      Yusuke Yaginuma and Yoshiteru Aoyagi
    • Organizer
      15th World Congress on Computational Mechanics & 8th Asian Pacific Congress on Computational Mechanics
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Spherulite Microstructure Formation Simulation Based on Effect of Molding Conditions on Polylactic Acid2022

    • Author(s)
      Hong Liqin, Koichi Tatsuno and Yoshiteru Aoyagi
    • Organizer
      15th World Congress on Computational Mechanics & 8th Asian Pacific Congress on Computational Mechanics
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 結晶性ポリマの球晶組織が力学特性に与える影響および非線形粘弾塑性シミュレーション2022

    • Author(s)
      牛込良海, Narita Camboulives Louis, 青柳吉輝
    • Organizer
      日本材料学会第71期学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Evaluation of Local Mechanical Properties of Polylactic Acid Spherulite Microstructures by Nanoindentation Test2022

    • Author(s)
      Hong Liqin, Aoyagi Yoshiteru
    • Organizer
      日本材料学会第71期学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] ナノインデンテーション法による準安定オーステナイトの変態誘起塑性に関する力学的特性評価2022

    • Author(s)
      西村将輝, 青柳吉輝
    • Organizer
      日本材料学会第71期学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] 準安定オーステナイトの初期結晶組織が変態誘起塑性の微視的力学特性に与える影響2022

    • Author(s)
      西村将輝, 青柳吉輝
    • Organizer
      第7回材料WEEK 材料シンポジウム ワークショップ
    • Related Report
      2022 Research-status Report
  • [Presentation] 押込み試験を用いた鋼材構成組織単体における応力ひずみ関係推定手法の提案2022

    • Author(s)
      坂巻巧, 西本圭佑, 貝ヶ石康平, 黒澤瑛介, 西村将輝, 青柳吉輝
    • Organizer
      第7回材料WEEK 材料シンポジウム ワークショップ
    • Related Report
      2022 Research-status Report
  • [Presentation] Investigation of Effect of Crystallinity on Local Mechanical Properties of Polylactic Acid2022

    • Author(s)
      Hong Liqin, Aoyagi Yoshiteru
    • Organizer
      第7回材料WEEK 材料シンポジウム ワークショップ
    • Related Report
      2022 Research-status Report
  • [Presentation] ポリ乳酸の球晶構造を模擬した三次元高分子塑性シミュレーション2022

    • Author(s)
      牛込良海, 青柳吉輝
    • Organizer
      第7回材料WEEK 材料シンポジウム ワークショップ
    • Related Report
      2022 Research-status Report
  • [Presentation] 双晶の体積分率に依存する流れ応力を考慮した双晶誘起塑性モデルに基づく結晶塑性解析2022

    • Author(s)
      大橋春希, 青柳吉輝
    • Organizer
      日本機械学会第35回計算力学講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Crystal Plasticity Simulation Considering Microstructures of High Entropy Alloy on Mechanical Properties2021

    • Author(s)
      Aoyagi, Y. and Mori, S.
    • Organizer
      International Conference on Processing & Manufacturing of Advanced Materials
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Simulated Microstructure Effects on Macroscopic Mechanical Properties Based on Multiscale Crystal Plasticity2021

    • Author(s)
      Aoyagi, Y., Kobayashi, R. and McDowell, D. L.
    • Organizer
      The 13th International Conference on the Technology of Plasticity
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 純チタン中のヘテロナノ組織に関する結晶塑性解析手法の構築と変形挙動の評価2021

    • Author(s)
      柳沼雄介, 下川智嗣, 渡邊千尋, 三浦博己, 青柳吉輝
    • Organizer
      日本材料学会第70期学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Plasticity Modeling of Glassy Polymer Based on Microscopic Behavior of Molecular Chains2021

    • Author(s)
      Narita Camboulives Louis, Aoyagi Yoshiteru
    • Organizer
      第7回材料WEEK 材料シンポジウム ワークショップ
    • Related Report
      2021 Research-status Report
  • [Presentation] 結晶塑性FEM解析における圧延集合組織のモデリング2021

    • Author(s)
      柳沼雄介, 青柳吉輝
    • Organizer
      第7回材料WEEK 材料シンポジウム ワークショップ
    • Related Report
      2021 Research-status Report
  • [Presentation] ポリ乳酸の球晶組織形成に成形温度が与える影響に関する研究2021

    • Author(s)
      龍野孝一, 青柳吉輝
    • Organizer
      日本機械学会第29回 機械材料・材料加工技術講演会(M&P2021)
    • Related Report
      2021 Research-status Report
  • [Presentation] ハイエントロピー合金の双晶誘起塑性に関する結晶塑性論的検討2021

    • Author(s)
      森茂樹, 青柳吉輝
    • Organizer
      日本機械学会第29回 機械材料・材料加工技術講演会(M&P2021)
    • Related Report
      2021 Research-status Report
  • [Remarks] 青柳研究室@東北大学機械系

    • URL

      https://web.tohoku.ac.jp/aoyagi/

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
  • [Remarks] 東北大学大学院工学研究科 青柳研究室

    • URL

      https://web.tohoku.ac.jp/aoyagi/

    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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